1993

5.5

2020

5.0

2005

6.2

2008

6.2

1971

5.5

1964

5.8

1982

5.4

1998

7.0

1998

5.5

1999

8.0

1997

3.0

1974

7.5

2001

7.3

2014

6.3

2004

6.2

1992

6.6

2008

5.1

1995

6.5

2006

5.2

1996

6.7